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  1. Seasonal Affective Disorder - National Institute of Mental Health …

    SAD is a type of depression characterized by a recurrent seasonal pattern, with symptoms lasting about 4−5 months out of the year. The signs and symptoms of SAD include those associated with …

  2. Seasonal affective disorder (SAD) - Symptoms & causes - Mayo Clinic

    Dec 14, 2021 · Seasonal affective disorder (SAD) is a type of depression that's related to changes in seasons — SAD begins and ends at about the same times every year. If you're like most people with …

  3. SAD Definition & Meaning - Merriam-Webster

    The meaning of SAD is affected with or expressive of grief or unhappiness : downcast. How to use sad in a sentence.

  4. Seasonal affective disorder - Wikipedia

    SAD is usually more common in the fall/winter (Winter SAD), though it may occur during the spring/summer (Spring SAD). Winter-onset SAD is more common and is often characterized by …

  5. Seasonal Affective Disorder - Johns Hopkins Medicine

    What is seasonal affective disorder? Seasonal affective disorder (SAD) is a type of depression. It happens during certain seasons of the year, most often fall or winter. It is thought that shorter days …

  6. Seasonal Affective Disorder - What is SAD? | SAMHSA

    Apr 24, 2023 · Seasonal affective disorder, or SAD, is a condition in which some people experience a significant mood change when the seasons change. SAD is not considered a separate disorder but is …

  7. SAD | English meaning - Cambridge Dictionary

    SAD definition: 1. unhappy or sorry: 2. If something looks sad, it looks worse than it should because it is not…. Learn more.

  8. sad - Wiktionary, the free dictionary

    Jan 20, 2026 · sad (comparative sadder or more sad, superlative saddest or most sad) (heading) Emotionally negative. She gets sad when he's away. c. 1590–1592 (date written), William …

  9. SAD definition and meaning | Collins English Dictionary

    If you describe someone as sad, you do not have any respect for them and think their behaviour or ideas are ridiculous.

  10. Seasonal Affective Disorder - Psychology Today

    Feb 28, 2022 · Seasonal affective disorder, or SAD, is a type of recurrent major depressive disorder in which episodes of depression occur during the same season each year.